Here is my idea that I will do if it is in the $1,000 - $2,500 price range "for bottom end". I will be buying an LT1 engine with over 150K miles on it. I want to bore it out around .040 - .060. I also want to engine destroked. My goal is to have a 9-10K rpm 355 "or the more ci as possible" lt1. I know I will also want all forged internals. I want a short stroke like a 327 but a bore to make 355CI. Is that possible? What would the lengths of the connecting rods be and the bore of the pistons be? I want to shoot for the 400+HP range with this engine. I want to make an lt1 engine worth being on the cover of some hot rod magazine. What crankshaft, connecting rods, & pistons would I need? Also when buying a cylinder head * cam package what notes should I take in mind? How would I get the computer reprogrammed? Also does boring out the engine require me to have something done to the cylinder heads? I have noticed fords, hondas, and what ever have a high hp/ci ratio. I would like to have a much higher one.

 

Not with a LT1 block, what you are talking about takes a 327 stroke (3.25") and a 400 bore (4.125")

To get displacement of a V8 engine:

bore x bore x stroke x cylinders x .7854

Bret

 

A 10k reving 355, thats awesom, kinda new to al the motors if you can't tell.

 

^Well, your getting in over your head.

First off, I dont know if the stock block could handle that kind of RPM range. There are not many LT1's spinning that high.

Second, you pretty much would have to go carbed, or some aftermarket EFI system. The stock PCM will NOT, in any way, allow the engine to run past the 7,000 RPM mark.

Lastly, if this is going to be a street car, its going to be horendoes to drive. A cam that spins a 327-355 to 10,000RPM's is going to idle like a race car. You will have NO bottom end power, and it will be nearly impossible to drive.

Lastly, there is no way to make a 355 using a 3.25" stroke on a LT block. But I think Bret said something about that as well.

The amount of money you would have to put into it to make a bottom end that reliably holds that kind of RPM is NOT going to be comparable to your average heads cam motor.

It'll take you broke, drive like ****, and need a carb or aftermarket EFI.

 

a top dollar forged crank for an application like this would probably cost more than your budget...... so in a nutshell, leave it alone